CN208919448U - A kind of 350MW steam turbine Direct Action Type high voltage adjusting valve actuating mechanism - Google Patents
A kind of 350MW steam turbine Direct Action Type high voltage adjusting valve actuating mechanism Download PDFInfo
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- CN208919448U CN208919448U CN201821548333.8U CN201821548333U CN208919448U CN 208919448 U CN208919448 U CN 208919448U CN 201821548333 U CN201821548333 U CN 201821548333U CN 208919448 U CN208919448 U CN 208919448U
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- high voltage
- actuating mechanism
- voltage adjusting
- valve
- spring base
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Abstract
A kind of 350MW steam turbine Direct Action Type high voltage adjusting valve actuating mechanism, it is related to a kind of high voltage adjusting valve actuating mechanism.The utility model is in order to solve the problems, such as oil existing for existing high voltage adjusting valve actuating mechanism rotten, concentrated wear and need to convert valve position signal.The manipulation seat (15) of the utility model is mounted on valve body, oil motor (11) is mounted on the upper end of manipulation seat (15), valve rod (4) is vertically arranged and one end of valve rod (4) is connect with oil motor (11), connector (7) and spring base (10) are mounted on the lower part of valve rod (4), disc spring (12) is sleeved between manipulation seat (15) and spring base (10), travel switch (14) is mounted on the lateral wall of valve body, and it is connect with spring base (10), dual redundant displacement sensor (13) is mounted on the lateral wall of valve body and is located above travel switch (14).The utility model generates electricity for fired power generating unit.
Description
Technical field
The utility model relates to a kind of high voltage adjusting valve actuating mechanisms, and in particular to a kind of 350MW steam turbine Direct Action Type is high
Press regulating-valve actuator.
Background technique
Steam turbine is as one of equipment most important in generating equipment, and safety, reliability are to guaranteeing entire unit just
Often operation plays a crucial role, and steam turbine passes through the aperture of executing agency's control valve, to adjust air inflow.So
Adopt an effective measure and scheme reduce executing agency failure rate.No matter collateral security steam turbine normal operation in terms of, still mention
In terms of high operating unit operational efficiency, all it is necessary.
Traditional 350MW conventional thermal power unit high voltage adjusting valve actuating mechanism is mostly the connection of lever 30, but this in recent years
The executing agency of lever type of attachment frequently occurs problem failure in unit in the process of running.
Existing lever executing agency (Fig. 1) disadvantage:
1, oil motor is closer apart from valve, make oil motor 11 and inside operation medium high pressure fireresistant oil be chronically at compared with
High temperature condition causes oil rotten.
2, valve opening, valve rod 4 and manipulation seat connecting rod 50 can be made to generate lateral force in closing process, lead to local mill
Damage.
3, since lever connection 20 received signal of displacement sensor is oil motor stroke signal, and the valve of indirect output
Door valve position signal.It need to be according to connecting rod ratiometric conversion at valve position signal.
In conclusion oil existing for existing high voltage adjusting valve actuating mechanism is rotten, concentrated wear and needs to convert valve
The problem of position signal.
Utility model content
It is rotten, local that purpose of the utility model is to solve oil existing for existing high voltage adjusting valve actuating mechanism
The problem of wearing and needing to convert valve position signal.And then provide a kind of 350MW steam turbine Direct Action Type high voltage adjusting valve actuating mechanism.
The technical solution of the utility model is: a kind of 350MW steam turbine Direct Action Type high voltage adjusting valve actuating mechanism, it includes
Oil motor and valve rod；It further includes travel switch, spring base, connector, dual redundant displacement sensor, disc spring and manipulation seat, behaviour
Vertical seat is mounted on valve body, and oil motor is mounted on the upper end of manipulation seat, and valve rod is vertically arranged and one end of valve rod and oil motor connect
It connects, connector and spring base are mounted on the lower part of valve rod, and disc spring is sleeved between manipulation seat and spring base, and travel switch is mounted on
It on the lateral wall of valve body, and is connect with spring base, dual redundant displacement sensor is mounted on the lateral wall of valve body and is located at stroke
Switch top.
Further, it further includes attaching nut, is connected between connector and spring base by attaching nut.
Further, it further includes gasket, and gasket is equipped between connector and attaching nut.
Further, spring base moving hole is opened up on valve body.
Further, it further includes connecting rod, is connected between travel switch and spring base by connecting rod.
Further, it further includes spring pocket, and spring pocket is installed on manipulation seat and spring base.
Further, connector is T-shaped connector.
The utility model has the effect that compared with prior art
1, the utility model can effectively overcome the insufficient high voltage adjusting valve actuating mechanism of transmission levers connection mode disadvantage.
Installation and running space can be effectively saved, simplifies installation process, effectively avoids the side generated in link mechanism operational process
Xiang Li, avoid valve rod and manipulate seat connecting rod because friction guarantee concentricity, oil motor can be made far from valve, avoided because of fire resistant oil
Temperature overheat causes oil unqualified.It simplifies oil motor and manipulates the structure of seat, the cylindrical spring of original structure is replaced using disc spring
The height for reducing manipulation seat, shortens the stroke of oil motor.Optimize displacement sensor mounting means, displacement sensor is direct
It is installed on manipulation seat, making displacement sensor measured value is the aperture stroke of valve, simplifies the original intermediate link that converts.
2, the Direct Action Type high voltage adjusting valve actuating mechanism of the utility model, compared to traditional lever executing agency, effectively
Increase oil motor at a distance from valve.Cause oil rotten to make the fire-resistant oil temperature in oil motor be unlikely to excessively high.Subtract
The abrasion of small manipulation seat connecting rod, valve rod, prolongs its service life.The internal structure for simplifying manipulation seat, keeps its dismounting more square
Just.The valve opening conversion link of lever connection is eliminated, displacement sensor can directly feed back the aperture of valve out.
Detailed description of the invention
Fig. 1 is the main view of the prior art；Fig. 2 is the structural schematic diagram of the utility model；Fig. 3 is the tune of the utility model
Pressure valve actuator system structure chart.
Specific embodiment
Specific embodiment 1: illustrating present embodiment, a kind of 350MW steam turbine of present embodiment in conjunction with Fig. 2 to Fig. 3
Direct Action Type high voltage adjusting valve actuating mechanism, it includes oil motor 11 and valve rod 4；It further includes travel switch 14, spring base 10, connects
Device 7, dual redundant displacement sensor 13, disc spring 12 and manipulation seat 15 are connect, manipulation seat 15 is mounted on valve body, and oil motor 11 is mounted on
The upper end of seat 15 is manipulated, valve rod 4 is vertically arranged and one end of valve rod 4 is connect with oil motor 11, and connector 7 and spring base 10 are installed
In the lower part of valve rod 4, disc spring 12 is sleeved between manipulation seat 15 and spring base 10, and travel switch 14 is mounted on the lateral wall of valve body
On, and connect with spring base 10, dual redundant displacement sensor 13 is mounted on the lateral wall of valve body and is located on travel switch 14
Side.
Specific embodiment 2: illustrate that present embodiment, present embodiment further include attaching nut 9 in conjunction with Fig. 2 to Fig. 3,
It is connected between connector 7 and spring base 10 by attaching nut 9.So set, connection is relatively reliable, other compositions and connection are closed
It is same as the specific embodiment one.
Specific embodiment 3: illustrating that present embodiment, present embodiment further include gasket 8 in conjunction with Fig. 2 to Fig. 3, connect
Gasket 8 is equipped between device 7 and attaching nut 9.Other compositions and connection relationship are the same as one or two specific embodiments.
Specific embodiment 4: illustrating present embodiment in conjunction with Fig. 2 to Fig. 3, spring is opened up on the valve body of present embodiment
Seat moving hole 16.So set, convenient for driving connecting rod 17 to move in spring base moving hole 16 when disc spring 12 is stretched.It is other
Composition and connection relationship are identical as specific embodiment one, two or three.
Specific embodiment 5: illustrate that present embodiment, present embodiment further include connecting rod 17 in conjunction with Fig. 2 to Fig. 3, row
It is connected between Cheng Kaiguan 14 and spring base 10 by connecting rod 17.So set, convenient for guaranteeing that travel switch monitors disc spring in time
Operation stroke.Other compositions and connection relationship and specific embodiment one, two, three or four are identical.
Specific embodiment 6: illustrating that present embodiment, present embodiment further include spring pocket 18, bullet in conjunction with Fig. 2 to Fig. 3
Spring set 18 is installed on manipulation seat 15 and spring base 10.Convenient for guaranteeing the installation and stable operation of disc spring.Other compositions and connection
Relationship and specific embodiment one, two, three, four or five are identical.
Specific embodiment 7: illustrating present embodiment in conjunction with Fig. 2 to Fig. 3, the connector 7 of present embodiment is " T " word
Shape connector and adjustment gasket 8.So set, simplifying executing agency and valve rod in the process of Installation in Plant joint connection in site, incite somebody to action
After T-shaped connector is connect with threaded stem, adjustment spacer thickness is processed according to drawing technical requirements, it is real by connection bolt
The connection of existing connector 7 and spring base 10, that is, complete the installation process of executing agency and valve rod.It is other composition and connection relationship with
Specific embodiment one, two, three, four, five or six are identical.
The utility model simplifies original lever connection structure, maximum in the case where guaranteeing does not influence normal operation
The quantity of the reduction components of change.Installation, disassembly process are easy, connect oil motor, spring base and attaching nut before equipment factory
It connects, connects connector and valve rod during general assembly, directly connect executing agency with valve and pass through processing adjusting pad
The thickness of piece determines oil motor cushion stroke.It is finally completed the general assembly of valve and executing agency.When operation, oil motor can be direct
It pulls valve to realize open, close valve.
The Direct Action Type high voltage adjusting valve actuating mechanism of the utility model particularly may be divided into two parts, wherein valve opening process
It is realized by oil motor；The closing process of valve is realized by manipulating the disk spring in seat, is manipulated and is configured travel switch on seat
It is used to refer to standard-sized sheet position and the Quan Guanwei of valve.Dual redundant displacement sensor is used to feed back the valve position signal of valve.
Illustrate the utility model high voltage adjusting valve actuating mechanism working principle in conjunction with Fig. 3:
High pressure oil enters cylinder rod chamber by electrohydraulic servo valve 51 and piston 53 is driven to move upwards, and overcomes spring force and valve
Door steam resistance, control valve is opened and adjustable gate is in any opening degree.(steam turbine hypervelocity when steam turbine encounters critical condition
Deng), OPC security personnel oil 54 is released, while the chamber oil pressure processed of oil motor unloading valve 52 reduces rapidly, high pressure oil passes through unloading valve and oil return
Conducting, releases cylinder rod chamber oil pressure, valve quick closedown under spring force.
Claims (7)
1. a kind of 350MW steam turbine Direct Action Type high voltage adjusting valve actuating mechanism, it includes oil motor (11) and valve rod (4)；It is special
Sign is: it further includes travel switch (14), spring base (10), connector (7), dual redundant displacement sensor (13), disc spring
(12) it is mounted on valve body with manipulation seat (15), manipulation seat (15), oil motor (11) is mounted on the upper end of manipulation seat (15), valve rod
(4) it is vertically arranged and one end of valve rod (4) is connect with oil motor (11), connector (7) and spring base (10) are mounted on valve rod (4)
Lower part, disc spring (12) be sleeved on manipulation seat (15) and spring base (10) between, travel switch (14) is mounted on the outside of valve body
It on wall, and is connect with spring base (10), dual redundant displacement sensor (13) is mounted on the lateral wall of valve body and opens positioned at stroke
It closes above (14).
2. a kind of 350MW steam turbine Direct Action Type high voltage adjusting valve actuating mechanism according to claim 1, it is characterised in that:
It further includes attaching nut (9), is connected between connector (7) and spring base (10) by attaching nut (9).
3. a kind of 350MW steam turbine Direct Action Type high voltage adjusting valve actuating mechanism according to claim 2, it is characterised in that:
It further includes gasket (8), is equipped with gasket (8) between connector (7) and attaching nut (9).
4. a kind of 350MW steam turbine Direct Action Type high voltage adjusting valve actuating mechanism according to claim 3, it is characterised in that:
Spring base moving hole (16) are opened up on valve body.
5. a kind of 350MW steam turbine Direct Action Type high voltage adjusting valve actuating mechanism according to claim 4, it is characterised in that:
It further includes connecting rod (17), is connect between travel switch (14) and spring base (10) by connecting rod (17).
6. a kind of 350MW steam turbine Direct Action Type high voltage adjusting valve actuating mechanism according to claim 5, it is characterised in that:
It further includes spring pocket (18), and spring pocket (18) is installed on manipulation seat (15) and spring base (10).
7. a kind of 350MW steam turbine Direct Action Type high voltage adjusting valve actuating mechanism according to claim 6, it is characterised in that:
Connector (7) is T-shaped connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821548333.8U CN208919448U (en) | 2018-09-20 | 2018-09-20 | A kind of 350MW steam turbine Direct Action Type high voltage adjusting valve actuating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821548333.8U CN208919448U (en) | 2018-09-20 | 2018-09-20 | A kind of 350MW steam turbine Direct Action Type high voltage adjusting valve actuating mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN208919448U true CN208919448U (en) | 2019-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821548333.8U Active CN208919448U (en) | 2018-09-20 | 2018-09-20 | A kind of 350MW steam turbine Direct Action Type high voltage adjusting valve actuating mechanism |
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| CN (1) | CN208919448U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112253265A (en) * | 2020-09-30 | 2021-01-22 | 中核核电运行管理有限公司 | Hydraulic servomotor operation seat spring box |
-
2018
- 2018-09-20 CN CN201821548333.8U patent/CN208919448U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112253265A (en) * | 2020-09-30 | 2021-01-22 | 中核核电运行管理有限公司 | Hydraulic servomotor operation seat spring box |
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